Attachment to steam-generators



(No Model.)

G.VW. STARK.

Attachment to. Steam Generators.

No. 236,270. Patented Jan. 4, 1881.

Ii. PETERS, PKOTO-LITHOGRAFHER. WASHINGTON. D C.

UNITED STATES PATENT Q EI E.

GEORGE W. STARK, OF WEST BAY CITY, MICHIGAN.

ATTACHMENT TO STEAM-GENERATORS.

SPECIFICATION formingpart of Letters Patent No. 236,270, dated January 4, 1881.

Application filed August 30, 1880.

To all whom it may concern:

Be it known that I, GEORGE W. STARK, of West Bay City, Bay county, Michigan, have invented an Improvement in a Combined Smoke-Burner and Spark-Arrester, of which the following is a specification.

The nature of my invention relates to certain new and useful improvements in attachments to steam-generators, by means of which the gases of combustion are consumed, thereby preventing the formation of smoke and utilizing such gases as fuel, and also arrests the sparks and prevents their being thrown out at the top of the smoke-stack, preventing accidental fires therefrom.

The invention consists in the peculiar con struction, combination, and operation of the parts, as more fully hereinafter set forth.

In the accompanying drawing, which forms a part of this specification, and in which my invention as attached to a steam-generator is shown in vertical central section, A represents an ordinary tubular boiler; B, thejacket; (J, the stack; D, the furnace; E, the bridge-wall;

F, the re'verberatory chamber in rear of bridgewall, and G the ash-pit, all of the ordinary construction, except that the ash-pit is tight, except as hereinafter described.

H is a pipe or a series of pipes communicating with the open air, and, leading downward through the stack and jacket, communicates with the ash-pit, through the front thereof, below the grate or fire-bed I.

J is a valt'e or damper in the snnkestack, operated from outside thereof.

K represents a pipe or pipes leading from the interior of the pipes H downward and rearward on each side of the furnace-chamber and through the bridge-wall into the chamber F; and L is a pipe in rear of the bridge-wall, connecting the two inner ends of the pipes K, and this pipe L is perforated to bring the air in the chamber within reach of the draft force.

Mis a branch pipe leading from the smokestack 0 through the cover of the tub N and downward in said tub, below the water-line thereof. 0 is a smoke-pipe leading from said tub to an exhaust-fan, P, which communicates with a pipe, Q, leading into the smoke-stack 0 above the damper, J, as shown.

In practice, the fire being made upon the (No model.)

fire-bed in the furnace, the damper J being open, and a suitable opening in the ash-pit to admit air being also opened, the products of combustion pass in the usual way through the smoke-stack. As steam has been generated to start the engine, the latter 'is put in motion, and being suitably connected with the blower P, the latter is also put into operation. The damper J is then closed, as well as the draftopening in the ash-pit, when the blower will exhaust the air from the ash-pit and from the chamber F through the fiues of the boiler, smoke-stack O, pipe M, tub N and water therein, and pipe 0, and discharge the same through the pipeQ into the stack above the damper, the water in the tub arresting the sparks. The air to feed combustion will then enter the pipe H, and, passing down through the jacket, will become highly heated, and in that condition will enter the ash-pit, feeding the fire with a hot-blast. As the gases of combustion require air for their consumption heated to a high degree, a small proportion of the air from the pipe H will becarried through the pipe Kand discharged throughthe perforations in the pipe Linto the chamber F, and, receiving additional heat in passing down the sides of the furnace, will mingle with the gases in the chamber and assist in their combustion, thereby preventing the formation of smoke.

R is a jacket around the pipe M, and extends from the smokestack to the top of the tub N.

S is blower, suitably connected with the engine, which, when in operation, blows air through the pipe T into said jacket, where it becomes highly heated when the entire device is in operation, and is discharged through the pipe U into suitable pipes, coils, or radiators for heating purposes, thereby utilizingthe heat, which would otherwise pass off through the smoke-stack.

What I claim as my invention is- 1. The combination, with the furnace of a steam-generator, of a pipe or series of pipes, H, communicating with the outer air and ash-pit and passing through the lower end of the smoke-stack, and a fan for exhausting the air from the furnace, all constructed and arranged substantially as described.

2. The combination, with the furnace of a steam-generator, of a pipe or a series of pipes,

H, communicating with the outer air and ashpit and passing through the lower end of the smoke-stack, a fan for exhausting the air from the'furnace, and a hot-air pipe or pipes, K, com- 5 municating with the outer air-pipe and the reverberatory chamber of the furnace and passing through the latter, all constructed and arranged substantially as described.

3. The combination, with the furnace of a to steam-generator, of the hot-air pipe H, smokestack 0, a fan for exhausting the air from the furnace, and water-tank N, all constructed and arranged substantially as described.

4. The combination, with the furnace D of a 15 steam-generator, of the hot-air pipe H, communicating with the outer air and ash-pit and passing through the lower end of the smokestack, pipes K L, chamber F, smoke-stack C, bent pipe M, Water-tank N, exhaust-fan P, and pipe Q, all constructed and arranged snbstan- 2o tially as described, and for the purpose set forth.

5. The combination, with the smoke-stack G, of the pipe M, jacket R, blower S, and pipes T U, all constructed and arranged substantially 2 5 as described, and for the purpose set forth.

GEORGE W. STARK. Witnesses:

H. S. SPR-AGUE, F. J. SooTT. 

